Which version of less is this compatible with?

[SteveHawes]

I am trying to use a feature that is present in less.js V3.5.0 (Maps) but it throws an error.
Consider the following less:

@colors: {
    @red: {
        base: #f00;
    };
    @blue: {
        base: #0f0;
    }
};

@theme: blue;

.color(@color, @type) {
  
}
.test {
    color: @colors[@@theme][base];
}

This should produce the following output:

.test {
  color: #0f0;
}

Instead I get an error saying
Undefined Variable: @colors[@@theme][base]

[Horcrux7]

Maps are currently not supported and it is difficult to implement it. That there is no plan to implement it.

[mattcoz]

Do you have any documentation of what is and isn't supported? I'm looking for another compiler to replace the one I've been using because it has been abandoned.

[Horcrux7]

There is no such documentation. You can take a look into the *.less files of the tests to see what is working: https://github.com/i-net-software/jlessc/tree/master/test/com/inet/lib/less/samples